摘要:
The invention relates to a process for the preparation of optionally branched, high molecular weight polyarylene sulphides with melt viscosities which can be established within a defined range and low corrosion.These polyarylene sulphides have been obtained by reacting alkali metal sulphides, if appropriate mixed with alkali metal bisulphides and reaction accelerators, with dihalogenoaromatics and polyhalogenoaromatics, with the addition of monohalogen and monomercapto compounds.
摘要:
This invention relates to a process for the preparation of high molecular weight, optionally branched polyarylene sulphides. These may be prepared from alkali metal sulphides and aromatic halogen compounds in a polar organic solvent in the absence of water.
摘要:
The present invention relates to a process for the recovery of aromatic, high-molecular weight, thermoplastic polycarbonates from polycarbonate scrap, it being possible for the polycarbonate scrap to be either in the pure form as transparent naturally-occurring material, or mixed together with organic and, especially, inorganic dyestuffs and/or other additives, or in the form of a blend with other thermoplastic materials.
摘要:
This invention relates to a process for the preparation of optionally branched polyarylene sulphides which are distinguished by their substantially lower corrosiveness.
摘要:
The invention is directed to flame-resistant, transparent aromatic polycarbonate compositions comprising polycarbonate resin and an additive amount of a member selected from the group consisting of aldehyde-bisulphite adducts and ketone-bisulphite adducts.
摘要:
Flameproof thermoplastic polyamide moulding materials which contain 2 to 20% by weight, based on the polyamide, of at least one non-halogenated cyclic aromatic inside compound.
摘要:
This invention relates to a process for the preparation of high molecular weight, optionally branched polyarylene sulphides. These may be prepared in polar organic solvents in the absence of water, substances containing water being dehydrated in the reaction mixture before the reaction.